package d13_math;

public class SystemTest {
    public static void main(String[] args) {
//        System.exit(0);//人为终止虚拟机（非0状态码）
        long l = System.currentTimeMillis();
        System.out.println(l);
        for (int i = 0; i < 1000000; i++) {
            System.out.println("xx"+i);
        }
        long l2 = System.currentTimeMillis();
        System.out.println((l2-l)/1000.0+"s");

    }
}
